Help with src/distrib

Hi,
I changed the x86 boot process so that it's possible to load the miniroot as
a module, meaning that (in theory) we don't need a seperate INSTALL kernel
any more. It goes something like this:
o Build GENERIC, ramdisk-big.fs, src/sys/modules/miniroot
o objcopy --add-section miniroot=ramdisk-big.fs \
--set-section-flags miniroot=alloc,contents,load,data \
miniroot.kmod
o Then in the boot loader: load /miniroot.kmod <cr> boot
The part I am stuck with is hooking it into the build, so that the module
gets built and put onto the root of the install CD-ROMs. The collection of
Makefiles under src/distrib is impenetrable to me.. Does anyone have
experience with this?
Thanks,
Andrew